Class: FeatureEnvy::Operation

Inherits:
Object
  • Object
show all
Defined in:
lib/feature_envy/operation.rb

Defined Under Namespace

Modules: PipelineOperator Classes: Pipeline

Constant Summary collapse

Placeholder = 
Object.new.freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args, **kwargs) ⇒ Operation

Returns a new instance of Operation.



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# File 'lib/feature_envy/operation.rb', line 63

def initialize *args, **kwargs
  @args   = args
  @kwargs = kwargs
end

Class Method Details

.[] ⇒ Object 



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# File 'lib/feature_envy/operation.rb', line 60

def [](...) = self.call(...)

.call(*args, **kwargs) ⇒ Object 



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# File 'lib/feature_envy/operation.rb', line 52

def call(*args, **kwargs)
  if args.include?(Placeholder) || kwargs.value?(Placeholder)
    new(*args, **kwargs)
  else
    perform(*args, **kwargs)
  end
end

.define(&block) ⇒ Object 



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# File 'lib/feature_envy/operation.rb', line 46

def define(&block)
  klass = Class.new(Operation)
  klass.define_singleton_method(:perform, &block)
  klass
end

Instance Method Details

#>>(rest) ⇒ Object 



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# File 'lib/feature_envy/operation.rb', line 88

def >>(rest)
  Pipeline.new(self, rest)
end

#[] ⇒ Object 



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# File 'lib/feature_envy/operation.rb', line 75

def [](...) = call(...)

#call(value) ⇒ Object 



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# File 'lib/feature_envy/operation.rb', line 68

def call value
  args   = @args.map { |arg| arg.equal?(Placeholder) ? value : arg }
  kwargs = @kwargs.transform_values { |arg| arg.equal?(Placeholder) ? value : arg }

  self.class.perform *args, **kwargs
end

#inspect ⇒ Object 



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# File 'lib/feature_envy/operation.rb', line 77

def inspect
  args = []
  @args.each do |arg|
    args << inspect_arg(arg)
  end
  kwargs_part = @kwargs.each do |key, arg|
    args << "#{key}: #{inspect_arg(arg)}"
  end
  "#{self.class.name}[#{args.join(", ")}]"
end